<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
        input::placeholder {
            color: #0138eb;
        }
    </style>
</head>

<body>
    <form action="">
        <input type="text" name="123" required="required" placeholder="moyi" autofocus="autofocus" autocomplete="on" />
        <!-- multiple是可以多选提交文件 -->
        <input type="file" multiple="multiple">
        <input type="submit" value="tijiao" />
    </form>
</body>

</html>